Specialized Turbo Vado SL 2 4.0

It’s been five years since Specialized unveiled the original Turbo Vado SL — a groundbreaking design that helped redefine the lightweight e-bike category. Weighing under 15kg, it was one of the first hybrid e-bikes to combine a mid-drive motor with the look and ride of a regular bike. Fast forward to 2025, and Specialized has finally released a long-awaited update. Tipping the scales at just over 20kg, the new model stretches the definition of ‘Super Light’, but based on its own merits as an e-bike, it has a lot to offer. I’ve spent the past six weeks riding the Specialized Turbo Vado SL 2 4.0 to find out if it lives up to the legacy of the original.
 

First ride

The bike was delivered fully assembled with only the handlebars needing to be straightened and pedals fitted. It’s bulkier than the original and looks more like an e-bike, due to the chunkier frame with an enlarged downtube required to house the bigger battery. There are also bigger, chunkier tyres. Out of the box, it weighed in at a portly 21kg. 

After charging the battery, I headed off for my first ride. Out on the road, the Turbo Vado SL 2 feels lighter than the scales suggest. It lacks the sprightly feel of the original but is more responsive and easier to pedal (without motor assistance) than other e-bikes in its weight category. When pedalling on the flat with a good tailwind, maintaining 20mph wasn’t difficult.

The Brose-developed mid-drive motor is excellent and feels punchier than the original. The sound is audible but not particularly intrusive. Most of my riding was done in Eco mode, as I found higher levels only necessary on steeper climbs. That said, the Sport setting was ideal when I used the bike for hilly delivery shifts around Plymouth. The difference between Sport and Turbo mode is minimal, but there is a significant difference between Sport and Eco. You can also fine-tune the assistance levels via the app.

The pedal assist is very smooth and responsive. As with the older model, it feels natural and like an extension of your own ability. I also like the way the assistance doesn’t just stop at 15.5mph but instead tapers off to just under 17mph. This makes the transition from assisted to unassisted riding smooth and barely perceptible.  

As expected, battery range has been significantly improved. The SL 2 now features a substantial 520Wh battery — over 200Wh more than the original. I used the bike for a 16-mile commute into Plymouth and could complete three round trips in Sport mode (44 miles) before needing a recharge. Using a mix of Eco and Sport modes, I managed a 31-mile delivery shift with 3,500ft of climbing and still had 20% battery remaining by the end.

The handling inspires confidence — you can really throw it into corners, and it doesn’t complain. I also found it comfortable, and despite spending hours in the saddle, I never experienced soreness or discomfort. Specialized’s Futureshock 3.1 – a shock-absorbing system built into the steerer and stem that reduces vibrations – does a fantastic job of reducing road buzz and vibration through the handlebars and is a good compromise between a suspension fork and a rigid one. Comfort is helped by the big 700x47c all-terrain tyres. 

Another plus was the Shimano Cues 1×10-speed gearing. It’s the first bike I’ve ridden with this updated drivetrain, and the gear shifts were crisp and precise throughout the six-week testing period. My only minor gripe was the jump between gears, but this would be a non-issue for most e-bike riders. The 48-tooth low gear at the back made even the steepest hills manageable in the lowest assist setting.

The Tektro brakes were also a strong point and performed well throughout the test period, even when carrying extra weight and tackling steep descents.

There’s an upgraded colour display with excellent functionality. If you’re using this bike to monitor and build your fitness, you can view real-time cadence and power output, and you can connect a heart rate monitor. The partner app also syncs with fitness platforms like Strava, and you can connect popular cycle computers such as Wahoo or Garmin.

The step-through version tested here features a relaxed frame geometry. I rode it across a variety of surfaces — from country lanes and city streets to light off-road trails — and regardless of the terrain, the SL 2 felt right at home. A step-through particularly well-suited for delivery work, where frequently mounting and dismounting with a heavy backpack would be awkward on a traditional frame.

When comparing it with the older model, the bigger battery is a plus, but calling it ‘Superlight’ is a stretch. The original felt more like riding a regular (unassisted) hybrid bike — you could happily ride 20 or 30 miles without using the motor. The extra 6kg on the SL 2 can make it feel sluggish at times (when riding without the motor activated) so you’re more likely to rely on the electric assistance.

Specification

The frame is typical Specialized quality with neat welds and a nice matt metallic grey finish. It features internal cable routing, dropped seat stays, and an angular tube profile, that results in a clean, modern aesthetic. There’s also provision for two bottle holders (one of which can be used to accommodate the optional battery range extender).

The latest SL 1.2 mid-drive motor offers an increase in peak power and torque over the older unit. Maximum power is up to 320W, and peak torque is up to 50Nm. As well as providing noticeably more grunt, the newer motor is quieter and feels more refined.

The colour display offers great functionality, allowing you to switch between screens using the centre button. If you’re tracking fitness data, there’s a real-time power meter that can sync with a cycle computer or fitness device via ANT+ or Bluetooth. You can also choose from several preset performance profiles or create a custom power profile to suit your riding style and fitness level.

The 520Wh battery gives the Vado SL 2 more scope for weekend adventures and is worth the weight penalty if you rely on the motor more. I regularly achieved nearly 50 miles between charges using a mix of Eco and Sport mode. Bear in mind I’m quite heavy and was riding in a very hilly area. A lighter rider could potentially achieve 60–70 miles of battery range in a flatter area.

Gearing is provided by Shimano’s excellent Cues 10-speed – a relatively new system. The shifting was precise, and the shifter had a light and positive action that felt more like Deore XT-level shifting quality. Considering the big jump between gears on the 11–48 cassette, shifting was impeccable. After nearly 500 miles, gear changes remained flawless, and I never had issues with a dropped chain.

The Tektro HD-R285 brakes with 160mm rotors performed well throughout my time with the bike. Despite some hairy descents, carrying an extra 15kg of shopping on my back, they always did the job. On the occasional wet day, they did produce some noise — a common trait among disc brakes.

The Vado SL 2 is generously equipped, and the test bike came fitted with a pannier rack and front and rear lights, which worked very well. There’s also a sturdy kickstand. The previously-mentioned FutureShock 3.1 improves rider comfort without needing a full suspension fork. It’s a a system that is used on Specialized’s high-end endurance bikes like the Roubaix.

The wheels and tyres took a good battering from kerb hopping, potholed backstreets and some light off-roading and they held up incredibly well. The Hemisphere all-terrain 700x47c tyres had a good balance, offering off-road grip while rolling quite nicely on the road. The tyres seem durable, and I never had a flat during the testing period.

Alternatives and conclusion

The Specialized Turbo Vado SL 2 4.0 currently costs £3,500, which puts it firmly in the premium e-bike price category.  

The Orbea Diem 10, recently reviewed by Rebecca, is an impressive — albeit more expensive — alternative at £5,299. It features Shimano’s excellent EP801 mid-drive motor paired with a 630Wh battery and an Enviolo automatic CVP hub transmission. The Diem 10 is a high-tech urban step-through that isn’t much heavier than the Vado SL 2.

For those on a significantly tighter budget, Engwe’s P275 ST left a strong impression on Richard when he tested it a few months ago. It costs less than half the price of the Specialized at £1,499, and comes equipped with the Ananda mid-drive motor and a 691Wh battery. However, it’s no featherweight, tipping the scales at nearly 26kg.

I clocked over 500 miles on the Giant Expression E+1 last year, and although it’s about 4kg heavier than the SL 2, the extra weight didn’t pose an issue. It’s priced at £2,995 and features the excellent Giant SyncDrive Plus motor with Smart Assist, which automatically adjusts assistance based on your effort and the terrain — no need to manually switch between modes.

So, is the Specialized Turbo Vado SL 2 4.0 a worthy successor to the original? Yes, and no. Although I’d no longer class it as lightweight, it’s now a true jack of all trades. You can ride further and take on more challenging terrain if the mood takes you. It’s also very comfortable. While I preferred the lighter weight of the original, I’ve clocked up close to 500 miles on the Vado SL 2, and I’ll be sad to see it go.

specialized.com

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